Mercurial > sdl-ios-xcode

annotate src/video/SDL_drawpoint.c @ 5004:0c72ae7b7cb2

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Added native atomic operations for Windows, Mac OS X, and gcc compiler intrinsics. Changed the CAS return value to bool, so it's efficient with OSAtomicCompareAndSwap32Barrier() Added an atomic test adapted from code by Michael Davidsaver
author Sam Lantinga <slouken@libsdl.org>
date Sun, 16 Jan 2011 15:16:39 -0800
parents f7b03b6838cb
children
rev   line source
2901
133601e3b255 Added RenderPiont() API
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
1 /*
133601e3b255 Added RenderPiont() API
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
2 SDL - Simple DirectMedia Layer
3697
f7b03b6838cb Fixed bug #926
Sam Lantinga <slouken@libsdl.org>
parents: 3596
diff changeset
3 Copyright (C) 1997-2010 Sam Lantinga
2901
133601e3b255 Added RenderPiont() API
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
4
133601e3b255 Added RenderPiont() API
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
5 This library is free software; you can redistribute it and/or
133601e3b255 Added RenderPiont() API
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
6 modify it under the terms of the GNU Lesser General Public
133601e3b255 Added RenderPiont() API
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
7 License as published by the Free Software Foundation; either
133601e3b255 Added RenderPiont() API
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
8 version 2.1 of the License, or (at your option) any later version.
133601e3b255 Added RenderPiont() API
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
9
133601e3b255 Added RenderPiont() API
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
10 This library is distributed in the hope that it will be useful,
133601e3b255 Added RenderPiont() API
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
133601e3b255 Added RenderPiont() API
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
133601e3b255 Added RenderPiont() API
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
13 Lesser General Public License for more details.
133601e3b255 Added RenderPiont() API
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
14
133601e3b255 Added RenderPiont() API
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
15 You should have received a copy of the GNU Lesser General Public
133601e3b255 Added RenderPiont() API
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
16 License along with this library; if not, write to the Free Software
133601e3b255 Added RenderPiont() API
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
133601e3b255 Added RenderPiont() API
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
18
133601e3b255 Added RenderPiont() API
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
19 Sam Lantinga
133601e3b255 Added RenderPiont() API
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
20 slouken@libsdl.org
133601e3b255 Added RenderPiont() API
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
21 */
133601e3b255 Added RenderPiont() API
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
22 #include "SDL_config.h"
133601e3b255 Added RenderPiont() API
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
23
133601e3b255 Added RenderPiont() API
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
24 #include "SDL_draw.h"
133601e3b255 Added RenderPiont() API
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
25
133601e3b255 Added RenderPiont() API
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
26
133601e3b255 Added RenderPiont() API
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
27 int
133601e3b255 Added RenderPiont() API
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
28 SDL_DrawPoint(SDL_Surface * dst, int x, int y, Uint32 color)
133601e3b255 Added RenderPiont() API
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
29 {
3536
0267b8b1595c Added interfaces for batch drawing of points, lines and rects:
Sam Lantinga <slouken@libsdl.org>
parents: 3160
diff changeset
30 if (!dst) {
0267b8b1595c Added interfaces for batch drawing of points, lines and rects:
Sam Lantinga <slouken@libsdl.org>
parents: 3160
diff changeset
31 SDL_SetError("Passed NULL destination surface");
0267b8b1595c Added interfaces for batch drawing of points, lines and rects:
Sam Lantinga <slouken@libsdl.org>
parents: 3160
diff changeset
32 return -1;
0267b8b1595c Added interfaces for batch drawing of points, lines and rects:
Sam Lantinga <slouken@libsdl.org>
parents: 3160
diff changeset
33 }
0267b8b1595c Added interfaces for batch drawing of points, lines and rects:
Sam Lantinga <slouken@libsdl.org>
parents: 3160
diff changeset
34
2901
133601e3b255 Added RenderPiont() API
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
35 /* This function doesn't work on surfaces < 8 bpp */
133601e3b255 Added RenderPiont() API
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
36 if (dst->format->BitsPerPixel < 8) {
3160
210e209b87cc error message typo fix
Sam Lantinga <slouken@libsdl.org>
parents: 2901
diff changeset
37 SDL_SetError("SDL_DrawPoint(): Unsupported surface format");
3536
0267b8b1595c Added interfaces for batch drawing of points, lines and rects:
Sam Lantinga <slouken@libsdl.org>
parents: 3160
diff changeset
38 return -1;
2901
133601e3b255 Added RenderPiont() API
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
39 }
133601e3b255 Added RenderPiont() API
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
40
133601e3b255 Added RenderPiont() API
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
41 /* Perform clipping */
133601e3b255 Added RenderPiont() API
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
42 if (x < dst->clip_rect.x || y < dst->clip_rect.y ||
133601e3b255 Added RenderPiont() API
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
43 x >= (dst->clip_rect.x + dst->clip_rect.w) ||
133601e3b255 Added RenderPiont() API
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
44 y >= (dst->clip_rect.y + dst->clip_rect.h)) {
133601e3b255 Added RenderPiont() API
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
45 return 0;
133601e3b255 Added RenderPiont() API
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
46 }
133601e3b255 Added RenderPiont() API
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
47
133601e3b255 Added RenderPiont() API
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
48 switch (dst->format->BytesPerPixel) {
133601e3b255 Added RenderPiont() API
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
49 case 1:
3596
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color.
Sam Lantinga <slouken@libsdl.org>
parents: 3536
diff changeset
50 DRAW_FASTSETPIXELXY1(x, y);
2901
133601e3b255 Added RenderPiont() API
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
51 break;
133601e3b255 Added RenderPiont() API
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
52 case 2:
3596
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color.
Sam Lantinga <slouken@libsdl.org>
parents: 3536
diff changeset
53 DRAW_FASTSETPIXELXY2(x, y);
2901
133601e3b255 Added RenderPiont() API
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
54 break;
133601e3b255 Added RenderPiont() API
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
55 case 3:
133601e3b255 Added RenderPiont() API
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
56 SDL_Unsupported();
133601e3b255 Added RenderPiont() API
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
57 return -1;
133601e3b255 Added RenderPiont() API
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
58 case 4:
3596
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color.
Sam Lantinga <slouken@libsdl.org>
parents: 3536
diff changeset
59 DRAW_FASTSETPIXELXY4(x, y);
2901
133601e3b255 Added RenderPiont() API
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
60 break;
133601e3b255 Added RenderPiont() API
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
61 }
133601e3b255 Added RenderPiont() API
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
62 return 0;
133601e3b255 Added RenderPiont() API
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
63 }
133601e3b255 Added RenderPiont() API
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
64
3536
0267b8b1595c Added interfaces for batch drawing of points, lines and rects:
Sam Lantinga <slouken@libsdl.org>
parents: 3160
diff changeset
65 int
0267b8b1595c Added interfaces for batch drawing of points, lines and rects:
Sam Lantinga <slouken@libsdl.org>
parents: 3160
diff changeset
66 SDL_DrawPoints(SDL_Surface * dst, const SDL_Point * points, int count,
0267b8b1595c Added interfaces for batch drawing of points, lines and rects:
Sam Lantinga <slouken@libsdl.org>
parents: 3160
diff changeset
67 Uint32 color)
0267b8b1595c Added interfaces for batch drawing of points, lines and rects:
Sam Lantinga <slouken@libsdl.org>
parents: 3160
diff changeset
68 {
0267b8b1595c Added interfaces for batch drawing of points, lines and rects:
Sam Lantinga <slouken@libsdl.org>
parents: 3160
diff changeset
69 int minx, miny;
0267b8b1595c Added interfaces for batch drawing of points, lines and rects:
Sam Lantinga <slouken@libsdl.org>
parents: 3160
diff changeset
70 int maxx, maxy;
0267b8b1595c Added interfaces for batch drawing of points, lines and rects:
Sam Lantinga <slouken@libsdl.org>
parents: 3160
diff changeset
71 int i;
0267b8b1595c Added interfaces for batch drawing of points, lines and rects:
Sam Lantinga <slouken@libsdl.org>
parents: 3160
diff changeset
72 int x, y;
0267b8b1595c Added interfaces for batch drawing of points, lines and rects:
Sam Lantinga <slouken@libsdl.org>
parents: 3160
diff changeset
73
0267b8b1595c Added interfaces for batch drawing of points, lines and rects:
Sam Lantinga <slouken@libsdl.org>
parents: 3160
diff changeset
74 if (!dst) {
0267b8b1595c Added interfaces for batch drawing of points, lines and rects:
Sam Lantinga <slouken@libsdl.org>
parents: 3160
diff changeset
75 SDL_SetError("Passed NULL destination surface");
0267b8b1595c Added interfaces for batch drawing of points, lines and rects:
Sam Lantinga <slouken@libsdl.org>
parents: 3160
diff changeset
76 return -1;
0267b8b1595c Added interfaces for batch drawing of points, lines and rects:
Sam Lantinga <slouken@libsdl.org>
parents: 3160
diff changeset
77 }
0267b8b1595c Added interfaces for batch drawing of points, lines and rects:
Sam Lantinga <slouken@libsdl.org>
parents: 3160
diff changeset
78
0267b8b1595c Added interfaces for batch drawing of points, lines and rects:
Sam Lantinga <slouken@libsdl.org>
parents: 3160
diff changeset
79 /* This function doesn't work on surfaces < 8 bpp */
0267b8b1595c Added interfaces for batch drawing of points, lines and rects:
Sam Lantinga <slouken@libsdl.org>
parents: 3160
diff changeset
80 if (dst->format->BitsPerPixel < 8) {
0267b8b1595c Added interfaces for batch drawing of points, lines and rects:
Sam Lantinga <slouken@libsdl.org>
parents: 3160
diff changeset
81 SDL_SetError("SDL_DrawPoints(): Unsupported surface format");
0267b8b1595c Added interfaces for batch drawing of points, lines and rects:
Sam Lantinga <slouken@libsdl.org>
parents: 3160
diff changeset
82 return -1;
0267b8b1595c Added interfaces for batch drawing of points, lines and rects:
Sam Lantinga <slouken@libsdl.org>
parents: 3160
diff changeset
83 }
0267b8b1595c Added interfaces for batch drawing of points, lines and rects:
Sam Lantinga <slouken@libsdl.org>
parents: 3160
diff changeset
84
0267b8b1595c Added interfaces for batch drawing of points, lines and rects:
Sam Lantinga <slouken@libsdl.org>
parents: 3160
diff changeset
85 minx = dst->clip_rect.x;
0267b8b1595c Added interfaces for batch drawing of points, lines and rects:
Sam Lantinga <slouken@libsdl.org>
parents: 3160
diff changeset
86 maxx = dst->clip_rect.x + dst->clip_rect.w - 1;
0267b8b1595c Added interfaces for batch drawing of points, lines and rects:
Sam Lantinga <slouken@libsdl.org>
parents: 3160
diff changeset
87 miny = dst->clip_rect.y;
0267b8b1595c Added interfaces for batch drawing of points, lines and rects:
Sam Lantinga <slouken@libsdl.org>
parents: 3160
diff changeset
88 maxy = dst->clip_rect.y + dst->clip_rect.h - 1;
0267b8b1595c Added interfaces for batch drawing of points, lines and rects:
Sam Lantinga <slouken@libsdl.org>
parents: 3160
diff changeset
89
0267b8b1595c Added interfaces for batch drawing of points, lines and rects:
Sam Lantinga <slouken@libsdl.org>
parents: 3160
diff changeset
90 for (i = 0; i < count; ++i) {
0267b8b1595c Added interfaces for batch drawing of points, lines and rects:
Sam Lantinga <slouken@libsdl.org>
parents: 3160
diff changeset
91 x = points[i].x;
0267b8b1595c Added interfaces for batch drawing of points, lines and rects:
Sam Lantinga <slouken@libsdl.org>
parents: 3160
diff changeset
92 y = points[i].y;
0267b8b1595c Added interfaces for batch drawing of points, lines and rects:
Sam Lantinga <slouken@libsdl.org>
parents: 3160
diff changeset
93
0267b8b1595c Added interfaces for batch drawing of points, lines and rects:
Sam Lantinga <slouken@libsdl.org>
parents: 3160
diff changeset
94 if (x < minx || x > maxx || y < miny || y > maxy) {
0267b8b1595c Added interfaces for batch drawing of points, lines and rects:
Sam Lantinga <slouken@libsdl.org>
parents: 3160
diff changeset
95 continue;
0267b8b1595c Added interfaces for batch drawing of points, lines and rects:
Sam Lantinga <slouken@libsdl.org>
parents: 3160
diff changeset
96 }
0267b8b1595c Added interfaces for batch drawing of points, lines and rects:
Sam Lantinga <slouken@libsdl.org>
parents: 3160
diff changeset
97
0267b8b1595c Added interfaces for batch drawing of points, lines and rects:
Sam Lantinga <slouken@libsdl.org>
parents: 3160
diff changeset
98 switch (dst->format->BytesPerPixel) {
0267b8b1595c Added interfaces for batch drawing of points, lines and rects:
Sam Lantinga <slouken@libsdl.org>
parents: 3160
diff changeset
99 case 1:
3596
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color.
Sam Lantinga <slouken@libsdl.org>
parents: 3536
diff changeset
100 DRAW_FASTSETPIXELXY1(x, y);
3536
0267b8b1595c Added interfaces for batch drawing of points, lines and rects:
Sam Lantinga <slouken@libsdl.org>
parents: 3160
diff changeset
101 break;
0267b8b1595c Added interfaces for batch drawing of points, lines and rects:
Sam Lantinga <slouken@libsdl.org>
parents: 3160
diff changeset
102 case 2:
3596
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color.
Sam Lantinga <slouken@libsdl.org>
parents: 3536
diff changeset
103 DRAW_FASTSETPIXELXY2(x, y);
3536
0267b8b1595c Added interfaces for batch drawing of points, lines and rects:
Sam Lantinga <slouken@libsdl.org>
parents: 3160
diff changeset
104 break;
0267b8b1595c Added interfaces for batch drawing of points, lines and rects:
Sam Lantinga <slouken@libsdl.org>
parents: 3160
diff changeset
105 case 3:
0267b8b1595c Added interfaces for batch drawing of points, lines and rects:
Sam Lantinga <slouken@libsdl.org>
parents: 3160
diff changeset
106 SDL_Unsupported();
0267b8b1595c Added interfaces for batch drawing of points, lines and rects:
Sam Lantinga <slouken@libsdl.org>
parents: 3160
diff changeset
107 return -1;
0267b8b1595c Added interfaces for batch drawing of points, lines and rects:
Sam Lantinga <slouken@libsdl.org>
parents: 3160
diff changeset
108 case 4:
3596
f638ded38b8a Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color.
Sam Lantinga <slouken@libsdl.org>
parents: 3536
diff changeset
109 DRAW_FASTSETPIXELXY4(x, y);
3536
0267b8b1595c Added interfaces for batch drawing of points, lines and rects:
Sam Lantinga <slouken@libsdl.org>
parents: 3160
diff changeset
110 break;
0267b8b1595c Added interfaces for batch drawing of points, lines and rects:
Sam Lantinga <slouken@libsdl.org>
parents: 3160
diff changeset
111 }
0267b8b1595c Added interfaces for batch drawing of points, lines and rects:
Sam Lantinga <slouken@libsdl.org>
parents: 3160
diff changeset
112 }
0267b8b1595c Added interfaces for batch drawing of points, lines and rects:
Sam Lantinga <slouken@libsdl.org>
parents: 3160
diff changeset
113 return 0;
0267b8b1595c Added interfaces for batch drawing of points, lines and rects:
Sam Lantinga <slouken@libsdl.org>
parents: 3160
diff changeset
114 }
0267b8b1595c Added interfaces for batch drawing of points, lines and rects:
Sam Lantinga <slouken@libsdl.org>
parents: 3160
diff changeset
115
2901
133601e3b255 Added RenderPiont() API
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
116 /* vi: set ts=4 sw=4 expandtab: */